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9,253 diagnostic guides

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Find codes by symptomChoose what you notice to search matching code guides.

Rough idle or shakingVibration while stopped Hard to startLong cranking or no-start Engine stallsCuts out at idle or on the road Hesitates or loses powerSlow response when accelerating Battery light is onCharging system warning Harsh gear changesDelayed or rough shifting

A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.

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Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

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All severities9253 Low priority305 Check soon8256 Urgent621

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All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

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These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 1321–1344 of 7353

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P05C4Engine Coolant Pressure Sensor Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP05C4 relates to engine coolant pressure sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P05C5Engine Coolant Pressure Sensor Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP05C5 relates to engine coolant pressure sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05C6Engine Coolant Pressure Sensor Circuit Intermittent/ErraticCheck soonEngine Problems30–120 minutes for initial diagnosisP05C6 relates to engine coolant pressure sensor circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P05C7Economy Mode Switch Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05C7 relates to economy mode switch circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P05C8Economy Mode Switch Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05C8 relates to economy mode switch circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P05C9Economy Mode Switch Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05C9 relates to economy mode switch circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P05CAEconomy Mode Switch Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05CA relates to economy mode switch circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05CBVehicle Hardware IncompatibilityCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05CB relates to vehicle hardware incompatibility. Check the fault conditions and vehicle-specific procedure before replacing parts.P05CCCold Start A Camshaft Position Timing Performance Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP05CC relates to cold start a camshaft position timing performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P05CDCold Start A Camshaft Position Timing Performance Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP05CD relates to cold start a camshaft position timing performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P05CECold Start B Camshaft Position Timing Performance Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP05CE relates to cold start b camshaft position timing performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P05CFCold Start B Camshaft Position Timing Performance Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP05CF relates to cold start b camshaft position timing performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D0Driver Mode Select Switch A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D0 relates to driver mode select switch a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D1Driver Mode Select Switch A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D1 relates to driver mode select switch a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D2Driver Mode Select Switch A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D2 relates to driver mode select switch a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D3Driver Mode Select Switch A Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D3 relates to driver mode select switch a range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D4Driver Mode Select Switch B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D4 relates to driver mode select switch b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D5Driver Mode Select Switch B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D5 relates to driver mode select switch b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D6Driver Mode Select Switch B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D6 relates to driver mode select switch b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D7Driver Mode Select Switch B Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D7 relates to driver mode select switch b range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D8PCV Regulator Valve Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D8 relates to pcv regulator valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P05D9PCV Regulator Valve Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05D9 relates to pcv regulator valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P05DAPCV Regulator Valve Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05DA relates to pcv regulator valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05DBBrake Pedal Position Sensor B Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05DB relates to brake pedal position sensor b circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.